240 idle motor

montysano · Mar 5th, 2006, 20:59

Hello from across the pond!

I decided to take a shot at doing the routine fuel injection maintenance on my '92 240. So, I cleaned the throttle body, cleaned the idle motor (at least I guess I cleaned it; I sprayed cleaner down into it) and replaced the flame trap. New plugs, rotor, cap. Runs like a champ at highway speed.

However, it still wasn't idling well, which was the original complaint. On a chance, I disconnected the idle motor and started it. Idles beautifully. So, the question is: until I can sort out what's going on, am I doing damage by running it with the idle motor disconnected?

Thanks,

monty

Peter D · Mar 6th, 2006, 16:34

Not really but the ECU now knows the ICV is not there and has modified the running parameters. Remove the valve and place 12 volts across the two pins and the valve should rotate to the end stop. If you was to test it further apply 6V and the valve should be approximately 50 open. You can clean it whilst your there. Replace the valce and remember to clear the ECU fault codes. Check all vacuum pipes and establish that the bbake servo is not leakin air. Remove the pipe and block it off whilst ticking over to see if it effects the tick over. Regards Peter

Peter D · Mar 6th, 2006, 16:40

Further Measure the resistance of each HT lead including the King lead form brass end piece to brass end piece. Come back the results. they should all be close and about 3k from memory. Regards Peter

Mar 5th, 2006, 20:59	#1
montysano New Member Last Online: Oct 8th, 2011 18:55 Join Date: Feb 2006 Location: Huntsville, Alabama, USA	240 idle motor Hello from across the pond! I decided to take a shot at doing the routine fuel injection maintenance on my '92 240. So, I cleaned the throttle body, cleaned the idle motor (at least I guess I cleaned it; I sprayed cleaner down into it) and replaced the flame trap. New plugs, rotor, cap. Runs like a champ at highway speed. However, it still wasn't idling well, which was the original complaint. On a chance, I disconnected the idle motor and started it. Idles beautifully. So, the question is: until I can sort out what's going on, am I doing damage by running it with the idle motor disconnected? Thanks, monty

Mar 6th, 2006, 16:34	#2
Peter D Peter D Last Online: Mar 2nd, 2015 21:03 Join Date: Dec 2002 Location: Livingston	Not really but the ECU now knows the ICV is not there and has modified the running parameters. Remove the valve and place 12 volts across the two pins and the valve should rotate to the end stop. If you was to test it further apply 6V and the valve should be approximately 50 open. You can clean it whilst your there. Replace the valce and remember to clear the ECU fault codes. Check all vacuum pipes and establish that the bbake servo is not leakin air. Remove the pipe and block it off whilst ticking over to see if it effects the tick over. Regards Peter

Mar 6th, 2006, 16:40	#3
Peter D Peter D Last Online: Mar 2nd, 2015 21:03 Join Date: Dec 2002 Location: Livingston	Further Measure the resistance of each HT lead including the King lead form brass end piece to brass end piece. Come back the results. they should all be close and about 3k from memory. Regards Peter

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